Application Background Printer Friendly Version
Groundwater depth measurements (often called bore hole monitoring) help in the management of the important groundwater resource on which we depend for many purposes. In particular groundwater resources may be used up through agriculture or mining operations.
Instruments can easily measure the amount of water that resides in our groundwater so we can manage the resource better
Measurements can deepen our understanding of the factors that influence groundwater recharge and lead to more effective management.
Groundwater depth is measured with a small diameter sensor deep in an observation bore hole. Water depth can be measured with a pressure sensor lowered down the bore hole and immersed in the water. This is call hydrostatic depth method.
Alternatively a standard float-and-pulley sensor system with a small (50mm or 100mm) float and a pulley at the top of the bore hole can also be used to measure depth.
The hydrostatic depth method is widely used as it is convenient to install, however all pressure sensors have some drift which needs to be considered. The float and pulley method is less convenient, especially is narrow diameter bore holes of 100mm, however it is very accurate and is not subject to drift.
Unidata offers the 6542D Hydrostatic Water Depth and Temperature Probe which uses the hydrostatic pressure of water to measure water depths in various environments.
These systems are typically installed in existing bores, perhaps with a diameter of 100 to 200 mm and a depth of 5 to 50 meters, with a bore head cap, often in a valve box/ enclosure or some other form of bore head arrangement
A data logger / RTU / NRT needs to be added at the top of the bore and data recorded and collected manually, or the data can be tele metered to a central location on a regular, perhaps 4 hourly basis.
There are generally two types of customer for these systems
The data collected can be then viewed and limit checked and alarms set in the event of a sudden change in the ground water level.
The data can then be passed to a statistical groundwater analysis software package for groundwater modeling purposes.
Unidata offers a tubular version of the Neon Remote Terminal, which can be inserted within the bore casing for convenience of installation.
The 2024F NBHTM terminal is designed as telemetry system for bore holes with diameters of 50mm or greater via 3G /NextG/ WCDMA/ and 2G GPRS cellular networks from any location within the cellular network coverage area. The tubular housing allows for easy insertion with
clearance in bores as small as 50mm diameter. There is also a simple magnetic reset switch, which allows the user to easily reset the unit in the field without opening it to the elements.
|Options for Application Specific Instruments / Inputs||Unidata Part Number||Description|
|Hydrostatic Water Depth Probe||6542D-X||PT12 Pressure/Temperature Sensor SDI-12 3.5m, 10m or 20m|
|Hydrostatic Water Depth Probe - Titanium||6542D-X-T||Titanium PT12 Pressure/Temperature Sensor SDI-12 3.5m, 10m or 20m|
|Neon Bore Hole Telemetry Unit||2024F-SQL||SQL Neon Bore Hole Telemetry Module 3G with Antenna|
|Neon Bore Hole Telemetry Unit||2024F-INS||Insitu Neon Bore Hole Telemetry Module 3G with Antenna|
|Options for Neon Telemetry - NRT / RTU / Field Units||Unidata Part Number||Description|
|Cellular RTU 3G||2013F-AB03||Neon Metering Module 3G with Antenna and Li Battery|
|Cellular RTU 4G||2013F-AB04||Neon Metering Module 4G with Antenna and Li Battery|
|Cellular RTU 3G - Industrial||2016F-AB03||Neon Remote Terminal 3G with Antenna and Li Battery|
|Cellular RTU 4G - Industrial||2016F-AB04||Neon Remote Terminal 4G with Antenna and Li Battery|
|Low Earth Orbit Satellite Globalstar||2015E-AB0||Neon Remote Terminal - Satellite Globalstar Modem with Antenna and three Li Batteries|
|Ethernet||2017E-0B0-1 or 3||NRT Ethernet with single or triple Ethernet Ports|
with three Li Batteries
|Equatorial Orbit Satellite - Inmarsat||2018E-AB0-1 or 3||NRT Ethernet with single or triple Ethernet Ports|
with three Li Batteries
|LCD Display||2500E||NRT LCD Display|
|NRT Field Termination Strip||2103F||2015E,2016F,2017E, and 2018E NRT FTS|
|NRT Firmware Option||2303A-8M||8M Extended Memory Option|
|NRT Firmware Option||2303A-8M-CAM||8M Extended Memory & Serial Camera Option|
|NRT Firmware Option||2303A-CAM||Serial Camera Option|
|Options for Neon Application Software - Customer Server||Unidata Part Number||Description|
|Neon Application Software||2302A||Neon Server Software Licence Incl 5 NAL |
|Neon Application Software||2302A-10||Additional 10 NRT Access Licences|
|Neon Application Software||2302A-20||Additional 20 NRT Access Licences|
|Neon Application Software||2302A-50||Additional 50 NRT Access Licences|
|Options for Neon Application Software - Unidata Server||Unidata Part Number||Description|
|Neon Application Software||2301A||Neon Data Initial Subscription Setup Fee|
|Neon Hosting Service||2301A-01||Neon Data Service Fee for 1-50 NRTs|
|Neon Hosting Service||2301A-02||Neon Data Service Fee for 51-100 NRTs|
|Neon Hosting Service||2301A-10||Neon Data Service Fee Metering|
|Options for Conventional Dataloggers / Field Units||Unidata Part Number||Description|
|Standards Starlogger||6004D-11||Red Logger 512K with Alkaline Battery|
|Display Starlogger||6004D-21||Blue Logger 512K with LCD and Alkaline Battery|
|Prologger||7001D-11||Green Logger 1M with LCD and Alkaline Battery|
|Starlogger Field Termination Strip||6103E||6004D FTS|
|Prologger Field Termination Strip||7100E||7001D FTS|
|Starlog V4 Management Software||6308A-AUE||Starlog V4 Full Licence Key|